US11131338B2 - Connection device - Google Patents
Connection device Download PDFInfo
- Publication number
- US11131338B2 US11131338B2 US16/313,478 US201716313478A US11131338B2 US 11131338 B2 US11131338 B2 US 11131338B2 US 201716313478 A US201716313478 A US 201716313478A US 11131338 B2 US11131338 B2 US 11131338B2
- Authority
- US
- United States
- Prior art keywords
- joint
- coupling
- joint head
- socket
- prismatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0695—Mounting of ball-joints, e.g. fixing them to a connecting rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
Definitions
- the invention relates to a coupling for connection of a linear drive to a linearly guided slide element.
- couplings which corresponding to the drive direction are also called linear couplings.
- an axially rigid coupling as free of play as possible is necessary between the linear drive and the slide element.
- the coupling should be able to compensate both for an alignment error and also an offset which occurs perpendicularly to the direction of the linear motion between the drive and the output, i.e., the slide element, as free of torque bias as possible.
- an axially play-free linear drive which on the drive side consists of a disk-shaped hub with a threaded journal and on the output side of a disk-shaped hub with an internal thread.
- the two coupling hubs are connected to one another via four flat compensating springs which are each located offset by 90° to one another.
- the compensation springs can compensate both for a lateral offset and also an alignment error between the drive and the output which is limited by the radial play between the two coupling hubs.
- the connection of this linear coupling to the drive and to the output takes place here both on the drive side and also on the output side via threaded joints so that mounting is relatively complex and a corresponding tool is necessary.
- movement of the linear drive or of the slide element in the direction of the linear movement is necessary for mounting of the linear coupling.
- U.S. Pat. No. 4,704,043 A discloses a coupling for transmission of tensile or compressive forces which consists of a housing and two self-aligning bearings which are connected via the housing to one another.
- the ball elements of the self-aligning bearings are each supported in the housing via a track ring element which is screwed into the housing.
- the object of this invention is to provide an axially stiff coupling for connecting a linear drive to a linearly guided slide element which enables compensation of alignment error and of lateral offset between the drive side and the output side with mounting as simple as possible.
- the coupling has a coupling center piece, a ball joint and a prismatic joint, the ball joint and the prismatic joint being located on opposite sides of the coupling. Alignment errors can be compensated by the ball joint while compensation of a lateral offset is enabled by the prismatic joint.
- the ball joint and the prismatic joint each have a joint head and a corresponding joint head socket, in the mounted state of the coupling one joint head at a time being supported in the assigned joint head socket.
- the socket space of the joint head socket of the ball joint and/or the socket space of the joint head socket of the prismatic joint is open on at least on one side perpendicular to the longitudinal axis of the coupling.
- both the socket space of the joint head socket of the ball joint and also the socket space of the joint head socket of the prismatic joint are open to both sides so that the joint head of the ball joint or the joint head of the prismatic joint can be easily inserted into the respective joint head socket by a straight plugging motion transversely to the direction of the linear motion, i.e., transversely to the longitudinal axis of the coupling.
- the prismatic joint has two degrees of translational freedom perpendicular to the longitudinal axis of the coupling, i.e., perpendicular to the direction of linear motion. In this way it is possible to compensate for an offset between the slide element and the linear drive in both axes perpendicular to the direction of linear motion.
- the ball joint has at least two degrees of rotational freedom, the axes of the compensation motion which is possible in this way both running perpendicular to the longitudinal axis of the coupling. This enables a pivoting motion for compensation of alignment errors both in the horizontal and also in the vertical plane.
- the ball joint and the prismatic joint are each, moreover, made such that they both also have a degree of rotational freedom around the longitudinal axis of the coupling. Due to this degree of rotational freedom, the coupling center piece can turn freely relative to the drive and to the output, i.e., relative to the linear drive and the slide element, around the axis of the linear movement so that simple mounting of the coupling center piece is possible independently of the alignment of the coupling center piece around the longitudinal axis.
- both of the coupling center piece and also of the ball joint and of the prismatic joint are both made in the coupling center piece, while the joint head of the ball joint and the joint head of the prismatic joint are each connected to a connecting journal or are made on one connecting journal.
- the coupling center piece on one side then, has the joint head socket of the ball joint and on the other opposite side the joint head socket of the prismatic joint so that the coupling center piece can be easily slipped onto the joint heads of the ball joint and the prismatic joint by a linear plugging motion transversely to the longitudinal axis when the two joint heads are located with a corresponding distance to one another in the direction of linear motion.
- the two joint heads can be connected here by means of their connecting journal to the linear drive or to the slide element, for which the connecting journals can for example each both have a thread, in particular an external thread.
- the joint head of the ball joint and the joint head of the prismatic joint are made on the coupling center piece, while the joint head socket of the ball joint and the joint head socket of the prismatic joint are each connected to a connecting journal.
- the arrangement of the elements of the two joints is then interchanged compared to the embodiment described above.
- the fit between the joint head and the joint head socket of the ball joint is designed to be as free of play as possible. This prevents displacement between the joint head and the joint head socket in the direction of the longitudinal axis of the coupling, i.e., in the direction of linear movement, but enables compensation of alignment errors, i.e., of an angular offset.
- the fit between the joint head and the joint head socket of the prismatic joint is also designed to be preferably free of play in the direction of the longitudinal axis of the coupling. Perpendicular to the longitudinal axis of the coupling,
- Both the joint head of the ball joint and also the joint head of the prismatic joint can have different geometrical shapes.
- the joint head of the ball joint can be made in particular spherical or disk-shaped as long as the joint head together with the joint head socket enables the preferably two degrees of translational freedom.
- the joint head and the joint head socket of the prismatic joint are preferably each made T-shaped in the longitudinal section, the extension of the joint head socket perpendicular to the longitudinal axis of the coupling being greater than the corresponding extension of the joint head, i.e., the extension of the joint head perpendicular to the longitudinal axis.
- the play between the joint head and the joint head socket perpendicular to the longitudinal axis of the coupling is then determined by the corresponding difference in length between the joint head socket and the joint head perpendicular to the longitudinal axis of the coupling, this difference in length also establishing the greatest possible offset which can be compensated by the prismatic joint.
- Locking can be made in particular spring-loaded so that during mounting locking takes place automatically and in this way after mounting prevents unintentional loosening of the coupling. Intentional loosening of the coupling is, however, possible as before for corresponding spring-loaded locking.
- a bonded connection of the two elements of a joint can be implemented, for example, by the inner jacket surface of the socket or the outer surface of the joint head having a rubber coating.
- unintentional loosening of the coupling can also be prevented by the socket space of the joint head socket of the ball head and/or of the prismatic joint being at least partially closed by means of a corresponding cover so that the joint head cannot slide out of the corresponding socket space.
- FIG. 1 is a perspective view of a coupling in accordance with the invention for connecting a linear drive to a linearly guided slide element
- FIG. 2 is a cross-sectional view of the coupling for connecting a linear drive to a slide element according to FIG. 1 ,
- FIG. 3 is an enlarged partial cross-sectional view of the coupling according to FIGS. 1 and 2 ,
- FIG. 4 is a perspective view of the coupling center piece of the coupling according to FIG. 3 .
- FIGS. 5 a & 5 b show an alternative embodiment of a coupling in accordance with the invention, in a plan view and in a perspective view, respectively.
- FIG. 1 a coupling 1 for connecting a linear drive 2 to a linearly guided slide element 3 is shown.
- the coupling 1 which is shown separately in FIGS. 3, 5 a and 5 b , is comprised of a coupling center piece 4 , a ball joint 5 , and a prismatic joint 6 , the ball joint 5 and the prismatic joint 6 being located on opposite sides of the coupling 1 .
- the ball joint 5 is comprised of a joint head 7 and a corresponding joint head socket 8 .
- the prismatic joint 6 also has a joint head 9 and a corresponding joint head socket 10 .
- the joint head socket 8 of the ball joint 5 and the joint head socket 10 of the prismatic joint 6 each have a socket space 11 , 12 which is open on both sides perpendicular to the longitudinal axis L of the coupling 1 .
- the coupling center piece 4 thus need simply be pushed or slid onto the joint head 7 perpendicular to the direction of the linear motion R with the joint head socket 8 . Accordingly, to join the prismatic joint 6 , the joint head socket 10 must be slipped or pushed into the joint head 9 .
- the ball joint 5 and the prismatic joint 6 can also be joined by a rotational movement of the coupling center piece 4 around the longitudinal axis L in which the respective joint head 7 , 9 is likewise inserted into the assigned joint head socket 8 , 10 .
- FIG. 2 also shows how using the coupling 1 in accordance with the invention both an alignment error with an angle ⁇ and also an offset by a distance s between the linear drive 2 and the slide element 3 which is located in a guide 13 can be compensated.
- the compensation of the alignment error by the angle ⁇ takes place here by the ball joint 5 which has two degrees of rotational freedom so that a compensating pivoting motion is possible both in the direction shown in FIG. 2 and also perpendicular to the plane of the drawing.
- the compensation of a lateral offset by the distance s is enabled by the prismatic joint 6 that has a total of two degrees of translational freedom perpendicular to the longitudinal axis L of the coupling 1 .
- the axis of the second degree of freedom also extends perpendicular to the plane of the drawing.
- the joint head sockets 8 , 10 are both made in the coupling center piece 4 as corresponding grooves which are open on the face.
- the two joint heads 7 , 9 each have a connecting journal 14 , 15 which faces away from the coupling center piece 4 , on the two connecting journals 14 , 15 , an external thread 16 being made via which the joint head 7 of the ball joint 5 with the connecting journal 14 can be screwed in the connecting rod 17 of the linear drive 2 and the joint head 9 of the prismatic joint 6 with the connecting journal 15 in the slide element 3 .
- the coupling 1 thus is comprised essentially of three components, specifically the coupling center piece 4 , the joint head 7 of the ball joint 5 with the connecting journal 14 and the joint head 9 of the prismatic joint 6 with the connecting journal 15 .
- the section according to FIG. 3 shows that the joint head 9 and the joint head socket 10 of the prismatic joint 6 are each made T-shaped in a longitudinal section.
- the extension of the joint head socket 10 perpendicular to the longitudinal axis L of the coupling 1 is somewhat greater here than the corresponding extension of the joint head 9 so that, perpendicular to the longitudinal axis L of the coupling 1 , displacement between the joint head 9 and the joint head socket 10 , and thus, compensation of an offset between the linear drive 2 and the slide element 3 , are possible.
- the joint head 7 and the joint head socket 8 of the ball joint 5 are each made disk-shaped in a longitudinal section, the fit between the joint head 7 and the joint head socket 8 being designed to be free of play.
- the ball joint 5 can also have a ball-shaped joint head, i.e., a joint ball which can then, depending on the thickness of the coupling center piece 4 , protrude somewhat above the top and the bottom of the coupling center piece 4 .
- the section of the coupling 1 according to FIGS. 2 and 3 shows that, in a hole 18 in the joint head 9 , there is an elastic thrust piece 19 formed as a spring element by which the play-free arrangement of the joint head 9 in the joint head socket 10 in the direction of the longitudinal axis L of the coupling 1 is ensured.
- the elastic thrust piece 19 and a corresponding depression 20 made in the joint head socket 10 for this purpose implements positive and non-positive locking between the joint head 9 and the joint head socket 10 so that the joint head 9 is prevented from unintentionally sliding out of the joint head socket 10 perpendicular to the longitudinal axis L.
- Similar locking can also be formed between the joint head 7 and the joint head socket 8 of the ball joint 5 .
- unintentional loosening of the coupling 1 can also be prevented, for example, by the socket space 11 of the joint head socket 8 being at least partially closed by means of a cover after inserting the joint head 7 .
- FIGS. 5 a and 5 b show an alternative configuration of the coupling 1 , in a plan view ( FIG. 5 a ) and in a perspective view ( FIG. 5 b ).
- the joint head 7 of the ball joint 5 and the joint head 9 of the prismatic joint 6 are each made on the coupling center piece 4 .
- the joint head socket 8 of the ball joint 5 and the joint head socket 10 of the prismatic joint 6 in this embodiment are then each connected to a connecting journal 14 , 15 or are formed on one end of a connecting journal 14 , 15 .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
- Prostheses (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
Description
Claims (12)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU93139 | 2016-07-04 | ||
LU93139A LU93139B1 (en) | 2016-07-04 | 2016-07-04 | clutch |
PCT/EP2017/066617 WO2018007374A1 (en) | 2016-07-04 | 2017-07-04 | Connection device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20190249713A1 US20190249713A1 (en) | 2019-08-15 |
US11131338B2 true US11131338B2 (en) | 2021-09-28 |
Family
ID=56550941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/313,478 Active 2038-09-04 US11131338B2 (en) | 2016-07-04 | 2017-07-04 | Connection device |
Country Status (7)
Country | Link |
---|---|
US (1) | US11131338B2 (en) |
EP (1) | EP3478976B1 (en) |
JP (1) | JP2019527323A (en) |
KR (1) | KR102114724B1 (en) |
CN (1) | CN109563871A (en) |
LU (1) | LU93139B1 (en) |
WO (1) | WO2018007374A1 (en) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3512375A (en) * | 1968-11-27 | 1970-05-19 | Sealectro Corp | Flexible coupling for shafts |
US4704043A (en) | 1986-04-29 | 1987-11-03 | Southwest Products Co. | Means and techniques useful in push-pull controls |
US5411445A (en) | 1992-04-09 | 1995-05-02 | Yoshida Kogyo K.K. | Ball chain and splicing means therefor |
US5613792A (en) * | 1994-06-29 | 1997-03-25 | Showa Corporation | Ball joint |
DE19833030A1 (en) | 1997-07-23 | 1999-01-28 | Avm Inc | Ball socket connector |
US6287206B1 (en) * | 1998-10-26 | 2001-09-11 | Jack W. Stage | Limited angle universal joint |
DE20112773U1 (en) | 2001-08-01 | 2001-12-20 | Roma Rolladensysteme Gmbh | Rope connection device |
US20060293108A1 (en) * | 2005-06-17 | 2006-12-28 | Sun Prein Co., Ltd. | Solid prop rod of folding type seat |
US8550431B2 (en) * | 2007-10-15 | 2013-10-08 | Joerg Wisser | Shaft connection between two shafts |
DE102012013568A1 (en) | 2012-07-06 | 2014-05-08 | Carl Stahl Gmbh | connecting device |
US20150354624A1 (en) * | 2014-06-06 | 2015-12-10 | Saint-Gobain Performance Plastics Pampus Gmbh | Linear drive force overload protection device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4037978A (en) * | 1974-08-23 | 1977-07-26 | B.C. Investments Ltd. | Resilient swivel connector |
CN2339807Y (en) * | 1998-07-21 | 1999-09-22 | 周哲文 | Safety coupling joint capable of reassembling |
US9089986B2 (en) * | 2011-08-22 | 2015-07-28 | Milwaukee Electric Tool Corporation | Draw stud connector |
-
2016
- 2016-07-04 LU LU93139A patent/LU93139B1/en active IP Right Grant
-
2017
- 2017-07-04 WO PCT/EP2017/066617 patent/WO2018007374A1/en unknown
- 2017-07-04 KR KR1020197000756A patent/KR102114724B1/en active IP Right Grant
- 2017-07-04 US US16/313,478 patent/US11131338B2/en active Active
- 2017-07-04 EP EP17736644.0A patent/EP3478976B1/en active Active
- 2017-07-04 CN CN201780042094.0A patent/CN109563871A/en active Pending
- 2017-07-04 JP JP2018569149A patent/JP2019527323A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3512375A (en) * | 1968-11-27 | 1970-05-19 | Sealectro Corp | Flexible coupling for shafts |
US4704043A (en) | 1986-04-29 | 1987-11-03 | Southwest Products Co. | Means and techniques useful in push-pull controls |
US5411445A (en) | 1992-04-09 | 1995-05-02 | Yoshida Kogyo K.K. | Ball chain and splicing means therefor |
US5613792A (en) * | 1994-06-29 | 1997-03-25 | Showa Corporation | Ball joint |
DE19833030A1 (en) | 1997-07-23 | 1999-01-28 | Avm Inc | Ball socket connector |
US6287206B1 (en) * | 1998-10-26 | 2001-09-11 | Jack W. Stage | Limited angle universal joint |
DE20112773U1 (en) | 2001-08-01 | 2001-12-20 | Roma Rolladensysteme Gmbh | Rope connection device |
US20060293108A1 (en) * | 2005-06-17 | 2006-12-28 | Sun Prein Co., Ltd. | Solid prop rod of folding type seat |
US8550431B2 (en) * | 2007-10-15 | 2013-10-08 | Joerg Wisser | Shaft connection between two shafts |
DE102012013568A1 (en) | 2012-07-06 | 2014-05-08 | Carl Stahl Gmbh | connecting device |
US20150354624A1 (en) * | 2014-06-06 | 2015-12-10 | Saint-Gobain Performance Plastics Pampus Gmbh | Linear drive force overload protection device |
Also Published As
Publication number | Publication date |
---|---|
JP2019527323A (en) | 2019-09-26 |
LU93139B1 (en) | 2018-01-09 |
CN109563871A (en) | 2019-04-02 |
EP3478976A1 (en) | 2019-05-08 |
US20190249713A1 (en) | 2019-08-15 |
KR20190026753A (en) | 2019-03-13 |
KR102114724B1 (en) | 2020-05-25 |
WO2018007374A1 (en) | 2018-01-11 |
EP3478976B1 (en) | 2020-09-02 |
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